{"product_id":"tempstar-defrost-control-board-for-t2h336gkd100-heat-pump-ships-today","title":"Tempstar Defrost Control Board for T2H336GKD100 — Heat Pump | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is the genuine OEM defrost control board (part #1173636) for the Tempstar T2H336GKD100 heat pump. The defrost board is the brain of the outdoor unit during heating: it monitors coil temperature and run time, then commands a defrost cycle to melt frost from the outdoor coil by reversing the system and shutting off the condenser fan. It also coordinates the reversing valve, compressor, and auxiliary heat. When the board fails, the heat pump may ice over and lose heating capacity, run defrost too often or never, leave the fan running during defrost, or fail to switch between heating and cooling. A faulty defrost board often mimics refrigerant or sensor problems, so accurate diagnosis saves time and money.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1173636\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eDefrost Control Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eTempstar (ICP \/ Heil \/ Comfortmaker family)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Voltage\u003c\/td\u003e\n\u003ctd\u003e24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHeat pump outdoor unit defrost control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eBuilt as the factory replacement for the Tempstar T2H336GKD100 heat pump. Because the ICP family shares control electronics, this defrost board frequently fits comparable Heil, Comfortmaker, and ICP heat pumps. Match the part number and connector layout to your existing board before installing.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the outdoor unit control panel cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every connector, the defrost sensor lead, and the timing\/jumper settings before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug each harness, release the standoffs or screws, and lift out the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board, set defrost timing jumpers to match, and reconnect every harness per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, initiate a forced defrost, and confirm the reversing valve, compressor, and fan respond correctly.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOutdoor coil ices over and heating capacity drops\u003c\/li\u003e\n\u003cli\u003eDefrost cycle runs constantly or never initiates\u003c\/li\u003e\n\u003cli\u003eFan runs during defrost or stays off when it shouldn't\u003c\/li\u003e\n\u003cli\u003eNo response from the reversing valve or compressor on a call\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\u003cp\u003eShips same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"Tempstar","offers":[{"title":"Direct Replacement","offer_id":63021821100403,"sku":"1173636-GEN","price":169.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048439300467,"sku":"1173636","price":219.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1173636_7ad9fd3f-ad20-4e60-ba7b-f9c5bf7ab484.jpg?v=1782959643","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-defrost-control-board-for-t2h336gkd100-heat-pump-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}